Meaning

noun an associate who shares a room with you

adjective (of buildings and rooms) having ample space

originEtymology tree Proto-Indo-European *Hrew-? Proto-Indo-European *(H)rewH-der. Proto-Germanic *rūmą Proto-West Germanic *rūm Old English rūm Middle English roum English room Proto-Indo-European *-kos Proto-Germanic *-gaz Proto-West Germanic *-g Old English -iġ Middle English -y English -y English roomy From room + -y.

Etymology from Wiktionary, CC BY-SA 3.0